Water tank radiator coolant hose OE 31338301 Radiator hose intake for Volvo Engine coolant pipe​

Product Description:

Car heater water hose
OE NO.:   31338301 31338302

Applicable vehicle type: For Volvo

The heater pipe connects the engine cooling system to the heater core, primarily serving to convey heat-laden coolant from the engine cooling system to the heater core. Through heat exchange, the heater core's fan then directs warm air into the passenger compartment, providing a warm and comfortable driving environment for the driver and passengers. It also facilitates windscreen defrosting.

Core Fault Types:

1. Pipe Ageing and Cracking

Reduced or absent cabin heating

2. Joint Leakage

Intermittent heating with minor leaks; rapid coolant depletion and engine warning with severe leaks

3. Pipe Clogging/Blockage

Low heating output temperature (barely warm), with inconsistent temperatures from left and right vents

4. Pipe Detachment

Sudden loss of heating accompanied by audible fluid leakage sounds from engine bay

5. Wear caused by vibration

No issues when cold; after engine warms, pipe expansion causes tighter contact with metal components, accelerating wear.

6. Material Corrosion Resistance Failure

Rust spots or bulges appear on the inner walls of water pipes, or green/white corrosion products form at joints.

• 20 years of specialized auto parts industry experience
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